What do you get when you combine a microwave and a pan full of those pastel colored marshmallows known as peeps? NPR's science reporter, Adam Cole demonstrates in this segment the squishy mess can actually help you calculate the speed of light. Adam Cole joins Hari for a conversation on the speed of light. Most elementary school students learn about the hydrologic cycle, the circulation of water from the atmosphere to the earth and back again. How is this cycle affected by change in climate over time? To find out, scientists at the Coweeta Hydrologic Laboratory have been recording data from a western North Carolina watershed for more than 80 years. And the data provides valuable information on the effects of climate change. Imagine a world where cyborg locusts are trained to detect bombs. Sounds strange? One lab in St. Louis Missouri is busy making this a reality.